Cover structure

ABSTRACT

A cover structure is disclosed. When an annular sealing portion of a cover body is engaged with a container, a sealing section of the annular sealing portion abuts against an annular inner surface of the container, and then, a folding section of the annular sealing portion is folded to a sealing state, so that part of the folding section abuts against the annular outer surface of the container to form a dual leak-proof sealing structure. The folding section of the annular sealing portion is an annular elastic and full-peripheral tightening structure. Therefore, the sealing between the container and the cover may be strengthened for a good sealing effect, and preventing liquid in the container from being splashed on surrounding articles. When the folding section is in the unsealing state, the cover can be separated from the container, which is convenient to carry and use.

BACKGROUND Field of the Invention

The present invention relates to a cover structure, and more particularly to a cover structure capable of airtightly engaged with a container.

Related Prior Art

Please refer to Republic of China (ROC) patent No. M301862 related to a container for demonstration, which mainly includes a container body and a base. The bottom of the container body is provided with a fitting portion, and the top of the base is provided with a joint portion. The joint portion is fitted into the fitting portion on the bottom of the container body, so that a container with a base can be formed and can be placed on a display stand for demonstration. In addition, after the base is separated from the container body, the base can also function as a lid to cover the top opening of the container body to prevent the liquid from being spilled out.

However, when the base covers the top opening of the container body, its tightness is quite insufficient, resulting in gaps. In this case, due to shaking or tilting of the container, the liquid in the container body is easily spilled out. Such a container can't meet the requirement of reliable tightness in use. Moreover, in the past, the structure in which the base covers the container body is usually suitable only for indoor use, and cannot be carried out for use. Therefore, the container is inconvenient for users who stay outside.

There is also a structure for the general lunch box to be buckled with the cover, such as: the food container provided by Lock & Lock®, in which a hook is extended at each of the four corners (edges) of the cover and is provided at the end thereof with a locking portion of a different form. The box is provided with buckle structures corresponding to the hooks, and the buckle structures at four corners are independent of each other and must be buckled individually with the corresponding hook so that the cover can be securely seal the opening of the lunch box. If any buckle structure is not buckled, it is possible that the lunch box cannot be airtight. Moreover, the four buckle structures can only be used as a fastening structure and have no other functions, so there is a need for improvement.

Therefore, how to solve the above-mentioned problems and deficiencies is the direction that the inventor of the present invention and those engaged in related industries urgently intend to study and improve.

SUMMARY

One objective of the present invention is to provide a cover structure, which can be tightly engaged with the container to form a multiple-tight-fitting form. Also, by virtue of the elastic ring structure on the entire periphery of the cover body, the cover structure can be reliably snapped on the container to prevent liquid leakage from the container.

To achieve the above objective, a cover structure suitable for use with a container is provided by the invention, the container includes an annular inner surface and an annular outer surface opposite the annular inner surface, and the cover structure comprises:

a cover body configured for covering the container, wherein an annular sealing portion that is capable of airtightly engaging with a top edge of the container is arranged along a peripheral edge of the cover body, the annular sealing portion is elastically arranged around a periphery of an opening of the container, and includes a sealing section capable of abutting against the annular inner surface, and a folding section connected to the sealing section, the folding section is capable of being switched between a sealing state and a unsealing state, when the folding section is folded to the sealing state, part of the folding section is abutted against the annular outer surface, and when the folding section is folded to the unsealing state, the folding section stops abutting against the annular outer surface.

Preferably, when the folding section is folded to the sealing state, a thickness of the sealing section is greater than a thickness of the folding section.

Preferably, the annular outer surface includes a concave area, and when the folding section is folded to the sealing state, the folding section forms a sealing area to press against the concave area and to airtightly match with the concave area in a convex-and-concave manner.

Preferably, the cover body is made of silicone material.

Preferably, the cover structure has a centerline, the folding section includes a first end connected to the sealing section, and a second end opposite the first end. When the folding section is folded to the sealing state, a distance from the centerline to the first end is L0, a distance from the centerline to the second end is L1, and they meet the following condition: L0>L1. When the folding section is folded to the unsealing state, a distance from the centerline to the first end is L2, a distance from the centerline to the second end is L3, and they meet the following condition: L3>L2.

Accordingly, the present invention proposes a cover structure, where when the annular sealing portion of the cover body is engaged with the container, the sealing section of the annular sealing portion abuts against the annular inner surface of the container, and then, the folding section of the annular sealing portion is folded to the sealing state, so that part of the folding section abuts against the annular outer surface of the container to form a dual leak-proof sealing structure. Moreover, the folding section of the annular sealing portion is an annular elastic and full-peripheral tightening structure. Therefore, the sealing between the container and the cover may be strengthened to form a good sealing effect, thereby preventing liquid contained in the container from being splashed on clothes, bags or surrounding articles. When the folding section is folded to the unsealing state during use, the cover can be separated from the container, which is convenient to carry and use.

Furthermore, the cover body is made of silicone material so that the cover body has good elasticity, stretchability and heat resistance, and can be cleaned and used repeatedly, which is environmentally friendly and does not cause any waste.

These together with other objects of the invention, along with the various features of novelty which characterize the invention, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural diagram of an embodiment of the present invention;

FIG. 2 is a perspective view showing that an embodiment of the present invention is engaged with a container;

FIG. 3 is an exploded perspective view showing an embodiment of the present invention and a container;

FIG. 4 is a cross-sectional view (1) of the embodiment of the present invention in use; and

FIG. 5 is a cross-sectional view (2) of the embodiment of the present invention in use.

DETAILED DESCRIPTION

The foregoing and other technical content, features, and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiment with reference to the drawings.

Referring to FIGS. 2-5, an embodiment of the present invention provides a cover structure suitable for use with a container 10, the container 10 is square, and includes an annular inner surface 11, an annular outer surface 12 opposite the annular inner surface 11, and an opening 13 located at the top of the container 10. The cover structure comprises a cover body 20.

The cover body 20 covers the top of the container 10. An annular sealing portion 21 that is capable of airtightly engaging with a top edge of the container 10 is arranged along a peripheral edge of the cover body 20, and the annular sealing portion 21 is elastically arranged around a periphery of the opening 13 of the container 10, and includes a sealing section 211 capable of abutting against the annular inner surface 11, and a folding section 212 connected to the sealing section 211. The folding section 212 can be switched between a sealing state P1 and an unsealing state P2. When folded to the sealing state P1, the folding section 212 is stretched to reach the sealing state P1, and the folding section 212 forms an elastic tightening state by the design of elastic annular shape thereof, so that part of the folding section 212 can be elastically abutted against the annular outer surface 12, and the folding section 212 and the sealing section 211 are separated by a distance D. When the folding section 212 is folded to the unsealing state P2, due to the elastic annular design of the folding section 212, the folding section 212 can be elastically stretched to climb over the edge of the cover body 20 and then be released for contracting, so that the folding section 212 can be maintained at the top of the cover body 20 without going over the cover body 20 to return to the sealing state P1, and the folding section 212 is indeed detached from the annular outer surface 12 to facilitate the lifting of the cover body 20 to put objects in or take objects out of the container at the opening 13 of the container 10. In this embodiment, when the folding section 212 is folded to the sealing state P1, a thickness T1 of the sealing section 211 is greater than a thickness T2 of the folding section 212. Through the design of the thickness T2 of the folding section 212 being relatively thinner, the user is able to easily switch the folding section 212 between the sealing state P1 and the unsealing state P2 to achieve the purpose of convenient use.

The annular outer surface 12 of the container 10 includes a concave area 111. When the folding section 212 is folded to the sealing state P1, the folding section 212 forms a sealing area 2121 to press against the concave area 111 and to tightly match with the concave area 111 in a convex-and-concave manner, thereby forming an airtight state to prevent air from entering the container 10 from the gap to ensure that the atmospheric pressure outside the container 10 is greater than the gas pressure in the container 10 to isolate the space in the container 10 from the outside.

Referring again to FIGS. 4 to 5, in this embodiment, the cover structure has a centerline C, the folding section 212 includes a first end 2122 connected to the sealing section 211, and a second end 2123 opposite the first end 2122. When the folding section 212 is folded to the sealing state P1, a distance from the centerline C to the first end 2122 is L0, a distance from the centerline C to the second end 2123 is L1, and the following condition is satisfied: L0>L1, thereby ensuring the airtight effect. When the folding section 212 is folded to the unsealing state P2, a distance from the centerline C to the first end 2122 is L2, a distance from the centerline C to the second end 2123 is L3, and the following condition is satisfied: L3>L2, so as to ensure that the cover body 20 can be separated from the container 10.

It is worth mentioning that the cover body 20 is made of silicone material, but the present invention is not limited to this. The cover body 20 has good elasticity, stretchability and heat resistance, and can be cleaned and used repeatedly, which is environmentally friendly and does not cause any waste.

While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

What is claimed is:
 1. A cover structure suitable for use with a container, the container including an annular inner surface and an annular outer surface opposite the annular inner surface, and the cover structure comprising: a cover body configured for covering the container, wherein an annular sealing portion that is capable of airtightly engaging with a top edge of the container is arranged along a peripheral edge of the cover body, the annular sealing portion is elastically arranged around a periphery of an opening of the container, and includes a sealing section capable of abutting against the annular inner surface, and a folding section connected to the sealing section, the folding section is capable of being switched between a sealing state and an unsealing state, when the folding section is folded to the sealing state, part of the folding section is abutted against the annular outer surface, and when the folding section is folded to the unsealing state, the folding section stops abutting against the annular outer surface.
 2. The cover structure as claimed in claim 1, wherein when the folding section is folded to the sealing state, a thickness of the sealing section is greater than a thickness of the folding section.
 3. The cover structure as claimed in claim 1, wherein the annular outer surface includes a concave area, and when the folding section is folded to the sealing state, the folding section forms a sealing area to press against the concave area and to airtightly match with the concave area in a convex-and-concave manner.
 4. The cover structure as claimed in claim 1, wherein the cover body is made of silicone material.
 5. The cover structure as claimed in claim 1, wherein the cover structure has a centerline, the folding section includes a first end connected to the sealing section, and a second end opposite the first end, when the folding section is folded to the sealing state, a distance from the centerline to the first end is L0, a distance from the centerline to the second end is L1, and the distances L0 and L1 meet the following condition: L0>L1, when the folding section is folded to the unsealing state, a distance from the centerline to the first end is L2, a distance from the centerline to the second end is L3, and the distances L2 and L3 meet the following condition: L3>L2. 